Neon matrix ESR investigation of 12C+2 and 13C+2 : Confirmation of a 4Σ-g ground electronic state
ACS Citation
Knight, L. B.; Cobranchi, S. T.; Earl, E. A. Neon matrix ESR investigation of 12C+2 and 13C+2 : Confirmation of a 4Σ-g ground electronic state. J. Chem. Phys. 1988, 88, 7348-7348.
Version of Record
Abstract
The 12C+2 and 13C+2 cation radicals have been isolated in neon matrices by the photoionization of C2(g) generated by the laser vaporization of thin carbon disks. A new procedure of supporting and thermally outgassing such targets for laser vaporization ESR studies in rare gas matrices is described. The ESR results confirm the4Σ-g ground electronic state assignment for C+2 and provide a valence orbital electronic structure characterization based on the 13C hyperfine structure (hfs). The ESR lines are extremely narrow for a high-spin powder sample and an intense off-angle or "extra-" absorption feature exibits unusual hfs. Normally forbidden (ΔMS>1) transitions were detected at low magnetic fields. The magnetic parameters for 13C+2 in a neon matrix at 4 K are: D=3668(3) MHz; g⊥ =2.0018(5); g‖ =2.0023(5); ‖A‖‖ =99.4(8) MHz; and ‖A⊥‖ =95.2(5) MHz.
Source Name
Journal of Chemical Physics
Publication Date
1-1-1988
Volume
88
Issue
12
Page(s)
9333-9342
Document Type
Citation
Citation Type
Article